phospho-APBB1 (Ser175) Rabbit pAb (一抗) | Bioss

APBB1

Amyloid-beta A4 precursor protein-binding family B member 1

Component of a complex, at least composed of APBB1,RASD1/DEXRAS1 and APP. Interacts (via PID domain 2) with APP (withthe intracellular domain of the beta-amyloid precursor protein).Interacts (via PID domain 2) with RASD1/DEXRAS1; impairs thetrancription activation activity. Interacts (via PID domain 1) withKAT5/TIP60. Interacts (via the WW domain) with the proline-richregion of APBB1IP. Interacts with TSHZ1 and TSHZ2 (By similarity).Interacts (via the WW domain) with histone H2AX (whenphosphorylated on 'Tyr-142') and the proline-rich region of ENAH.Interacts with MAPK8. Interacts (via PID domain 1) with TSHZ3 (viahomeobox domain). Interacts with SET. Found in a trimeric complexwith HDAC1 and TSHZ3; the interaction between HDAC1 and APBB1 ismediated by TSHZ3. Interacts (via WWW domain) with NEK6. Interacts(via WWW domain) with ABL1.

Cell membrane. Cytoplasm. Nucleus. Cellprojection, growth cone (By similarity). Nucleus speckle.Note=Colocalizes with TSHZ3 in axonal growth cone (By similarity).In normal conditions, it mainly localizes to the cytoplasm, while asmall fraction is tethered to the cell membrane via its interactionwith APP. Following exposure to DNA damaging agents, it is releasedfrom cell membrane and translocates to the nucleus. Nucleartranslocation is under the regulation of APP. Colocalizes withTSHZ3 in the nucleus. Co-localizes with NEK6 at the nuclearspeckles. Phosphorylation at Ser-610 by SGK1 promotes itslocalization to the nucleus

Highly expressed in brain; strongly reduced inpost-mortem elderly subjects with Alzheimer disease.

Phosphorylation at Ser-610 by SGK1 promotes its localizationto the nucleus (By similarity). Phosphorylated following nucleartranslocation. Phosphorylation at Tyr-547 by ABL1 enhancestranscriptional activation activity and reduces the affinity forRASD1/DEXRAS1.

Contains 2 PID domains.
Contains 1 WW domain.

Transcription coregulator that can have both coactivatorand corepressor functions. Adapter protein that forms atranscriptionally active complex with the gamma-secretase-derivedamyloid precursor protein (APP) intracellular domain. Plays acentral role in the response to DNA damage by translocating to thenucleus and inducing apoptosis. May act by specifically recognizingand binding histone H2AX phosphorylated on 'Tyr-142' (H2AXY142ph)at double-strand breaks (DSBs), recruiting other pro-apoptosisfactors such as MAPK8/JNK1. Required for histone H4 acetylation atdouble-strand breaks (DSBs). Its ability to specifically bindmodified histones and chromatin modifying enzymes such asKAT5/TIP60, probably explains its trancription activation activity.Function in association with TSHZ3, SET and HDAC factors as atranscriptional repressor, that inhibits the expression of CASP4.Associates with chromatin in a region surrounding the CASP4transcriptional start site(s).